JPS60190257A - Painting equipment - Google Patents

Abstract

PURPOSE:To enhance the operational efficiency of a fuel supply source, by utilizing heated air at the time of the steady operation of a painting and drying oven as the heat source of conditioned air supplied to a painting booth. CONSTITUTION:A painting and drying oven 4 has been operated before an article to be painted is fed in a painting booth 2 and fuel is supplied to a combustion burner 34 from a fuel supply source 36 through a supply pipe 37 to raise the temp. in the oven 4. From a time when fuel consumption for raising the temp. of the oven 4 begins to reduce gradually, the supply and exhaust of air of the painting both 2 is performed and a part of heated air is supplied to an air conditioner 11 from the oven 4 through a supply duct 39 and heated and humidified air is supplied into the painting booth 2 as conditioned air. When the interior of the booth is held at predetermined temp. and humidity and the oven interior is held to a predetermined temp., the article to be painted is fed into the booth 12 to receive the formation of a paint film and successively conveyed into the oven 4 through a setting chamber 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to coating equipment that effectively utilizes heated air during steady operation of a coating drying oven.

[Prior art]

Conventionally, when forming a paint film while continuously transporting an object to be painted, such as an automobile body, using a conveyor or other transport device, a paint booth, setting room, and paint drying oven were arranged in series. Painting equipment is widely used.

That is, the coating booth, setting chamber, and coating drying oven are each formed in the shape of a tunnel, and these are arranged in series. The space inside the paint booth is sequentially formed from the top into an air supply room, a painting room, and an exhaust room.The air supply room and the painting room are separated by a filter, and the painting room and the exhaust room are The area is divided by the border of Kanoko. The air supply chamber is connected with an air supply duct provided with an air conditioner and an air supply fan, and the exhaust chamber is connected with an exhaust duct provided with an exhaust fan.

Further, an air supply duct with a filter and an air supply fan is connected to the upper part of the setting chamber, and an exhaust duct with an exhaust fan is connected to the lower part of the setting chamber.

In addition, the paint drying oven is equipped with a circulation duct () at the top, one end of which is formed at the center of the upper part of the oven ().
One end is connected to one air chamber, and the other end is connected to supply air chambers formed on both sides of the lower part of the furnace. This circulation duct is provided with a combustion burner and a circulation fan, and a supply pipe communicating with a gas supply source is connected to the combustion burner.

Furthermore, the floor surfaces of the painting room, centing room, and paint drying oven of the painting booth are provided with a direction in the longitudinal direction of the central part.
Conveyors are installed that extend continuously, and while the object to be painted placed on the trolley is transported by the conveyor, a paint film is formed in the paint booth, and the paint film is baked and hardened in the paint drying oven. It looks like this.

In the painting booth, steam is used as an energy source to heat and humidify the conditioned air supplied to the painting room, and in the paint drying furnace, liquefied petroleum gas and liquefied petroleum gas are used as the energy source to heat the circulating air. Gas such as natural gas is used.

However, in such painting equipment, because the heat storage loss in the painting booth is small, as shown in Figure 4, the thermal energy is reduced when the temperature rises at the start of operation of the painting booth and during steady operation after reaching a predetermined temperature. There is almost no difference in the amount consumed, and it remains almost constant. On the other hand, because a large amount of heat is stored in a paint drying oven, as shown in Figure 5, a lot of heat energy is consumed when the temperature rises at the start of operation of the paint drying oven, and the temperature reaches the specified temperature. During steady operation, the amount of thermal energy consumed is much smaller than when the temperature is rising.

For this reason, there is a problem that the operating rate of the fuel supply source is poor during steady operation of the paint drying oven, and the fuel supply source is not used effectively.

[Purpose of the invention]

The present invention was made to solve the above-mentioned problems, and its purpose is to supply fuel by using the heated air that flows from the paint drying oven during steady operation as a heat source for the conditioned air supplied to the paint booth. The object of the present invention is to provide coating equipment that can improve the operating rate of the equipment.

[Applications of the Invention] In order to achieve the object of item 1, the coating film according to the present invention (
The configuration of the Ii5 includes a paint booth, setting room, and paint drying oven. I! An air supply duct and an exhaust duct I are arranged in succession and are connected to an air conditioned air supply source in the painting booth.
- a circulation duct is connected to the paint drying oven, a combustion burner and a circulation fan are provided in the middle of the circulation duct, and a supply pipe communicating with a fuel supply source is connected to the combustion burner. A supply duct 1- is disposed near the paint drying furnace, one end of which is buried in the circulation duct of the paint drying furnace, and the other end connected to the conditioned air supply source of the air supply duct. The heated air circulated during steady operation of the paint drying oven is used as a heat source for the conditioned air supplied to the paint booth.

[Action of the invention]

In such coating equipment, first, before the object to be coated is carried into the coating booth, the coating drying oven is operated, and fuel is supplied from the fuel supply source to the combustion burner through the supply pipe to raise the temperature inside the oven. . Then, when the amount of fuel consumed to raise the temperature of the paint drying oven gradually decreases, the paint booth is supplied and exhausted, and a portion of the heating air is passed through the supply duct from the paint drying oven to the air conditioner. Air is supplied, and the air introduced into the air conditioner is heated, at the same time humidified by steam, and supplied as conditioned air into the painting booth.

The inside of the painting booth is maintained at a predetermined temperature and humidity.
When the inside of the paint drying oven is maintained at a predetermined temperature, the object to be painted is carried into the painting booth and a paint film is formed. The object to be painted on which the paint film has been formed passes through a setting chamber and is carried into a paint drying oven, where the paint film is baked and hardened.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

FIG. 1 is a schematic side view of the coating equipment according to the present invention, FIG. 2 is an enlarged front view cut along line II-II in FIG. 1,
FIG. 3 shows an enlarged front view taken along line III--III in FIG. 1.

(Configuration of the embodiment) In FIGS. 1 to 3, 1 is painting equipment,
The coating equipment 1 includes a coating booth 2, a setting chamber 3, and a coating drying oven 4, each of which is formed in a tunnel shape.

As shown in FIG. 2, the space inside the painting booth 2 is formed into an air supply chamber 5, a painting chamber 6, and a JJR air chamber 7 in order from the top. The painting chamber 6 and the exhaust chamber 7 are separated by a screen 9.

The painting room 6 is open at both ends in the longitudinal direction.
The air supply chamber 5 and the exhaust chamber 7 are closed.

In addition, an air supply duct 10 is connected to the air supply chamber 5,
An air conditioner 11 is provided at its tip, and an air supply fan 12 is provided downstream thereof.

A gear gallery 11a is provided at the front of the air conditioner 11 to prevent rainwater from entering and to introduce air. In addition, on the downstream side of the gear rally lla in the air conditioner ll, there are a roll filter Ilb that removes dust from the air, an injection nozzle llc that warms the dust-removed air, and a steam atomizer Llb that humidifies the heated air. They are arranged sequentially.

Further, a conveyor 13 is installed on the upper surface of the screen 9 in the longitudinal direction of the central part of the painting room 6, and on this conveyor 13, an automobile body W, which is an object to be painted, is placed and conveyed. A plurality of dogs 15 are provided to be hooked to a trolley 14 for use.

Rails 16a and 16b having a U-shaped cross section are laid on both sides of the conveyor 13, and the cart 11 is guided by these rails 16a and 16b.

Further, automatic painting machines 17a and 17b such as reciprocators are arranged on the sides of both rails 16a and 16b, and these automatic painting stations 17a and 17b have spray guns 18a that spray paint toward the automobile body W. -18b is provided. Further, an exhaust duct l-19 is connected to the exhaust chamber 7, one end of which is open to the atmosphere. An exhaust fan 20 is provided in the middle of the exhaust duct 1-19 to suck in the conditioned air supplied to the painting room 6 and discharge it to the outside. In addition, exhaust chamber 7
A filter 21 is widely disposed throughout the inside of the paint chamber 6 to remove paint mist in the conditioned air discharged from the painting room 6.

Further, an air supply duct 22 is connected to the ceiling of the setting chamber 3, and a filter 23 is provided at the tip of the air supply duct 22, and an air supply fan 24 is provided downstream of the filter 23. . Further, a discharge duct 25 is provided at the bottom, and a discharge fan 26 is provided in the middle of the discharge duct 25. There is a painting booth 2 on the floor of setting room 3.
A conveyor 13 and rails 16a and 16b are laid in the longitudinal direction.

Furthermore, as shown in FIG. 3, partition plates 27a and 27b are arranged in the paint drying oven 4 in the longitudinal direction on both sides of the lower part, and these partition plates 27a and 27b are connected to the side oven wall 4a. The upper end thereof is bent toward the side furnace wall 4a, the tip thereof is fixed to the side furnace wall 4a, and the lower end is fixed to the floor surface. And the partition plate 27
There are multiple air outlets 28a and 28b below a and 27b.
is opened, and the partition plates 27a, 27b and the side furnace wall 4
The space between the air supply chambers 29a and 29a forms air supply chambers 29a, 29b.

Further, a partition plate 30 is disposed in the upper center of the paint drying oven 1 in the longitudinal direction, and both ends and side ends of the partition plate 30 are fixed to the ceiling oven wall 4b.

A plurality of suction ports 31 are opened in the lower surface of this partition plate 30, and the partition plate 30 and the ceiling furnace wall 4 are provided.
b forms an evacuation chamber 32.

Furthermore, a circulation duct 33 is installed outside the paint drying oven 4, one end of which is connected to an exhaust chamber 32 formed in the center of the upper part of Class 4, and the other end connected to both sides of the lower part of Class 4. It is connected to air supply chambers 29a, 29b formed in A combustion burner 34 and a circulation fan 35 are sequentially installed in this circulation duct 33, and a supply pipe 37 communicating with a fuel supply device 36 for liquefied petroleum gas, liquefied natural gas, etc. is connected to the combustion burner 34. A valve 38a for adjusting a fuel supply meter is provided in the middle of the connection.

Further, a supply duct 39 is arranged near the paint drying furnace 4, one end of which is connected to the circulation duct 23 of the paint drying furnace 4, and the other end is connected to the air supply duct 10. It is connected to the injection nostle llc of the air conditioner 11. A damper 42 is provided in the middle of this supply duct 39 to adjust the amount of heated air that is supplied to the injection nozzle IC of the air conditioner 11.

Further, one end of an air supply pipe 40 is connected to the steam injector 11d of the air conditioner 11, and the other end of this air supply pipe 40 is connected to a steam supply device 41. A valve 38b is provided in the middle of the air supply pipe 40,
It is adapted to regulate the amount of steam supplied to the steam injector lid.

On the floor of the paint drying oven 4, a conditioner 13 and rails 16a and 16b extending from the setting chamber 3 are laid in the longitudinal direction, and the automobile body W placed on the trolley 14 is placed in the paint booth 2. While being conveyed into the setting chamber 3 and the paint drying oven 4, a paint film is formed and the paint film is baked and hardened.

(Operation of the embodiment) In the coating equipment configured as described above, first, the coating drying oven 4 is started about one hour before the automobile body W, which is the object to be coated, is carried into the coating booth 2 by the trolley 14. At the same time, the circulation fan 35 is activated. As a result, the air in Class 4 is sucked through the suction port 31, and the air is sucked into the exhaust chamber 32, the circulation duct 33, and the air supply chamber 29a.
, 29b, and is blown out from the outlet ports 28a, 28b into the 4th section and circulated. Then, fuel is supplied from the fuel supply device 36 to the combustion burner 34 through the supply pipe 37, the air passing through the circulation duct 33 is heated, and the temperature inside the 4th type is increased.

On the other hand, when the temperature inside the paint drying oven 4 increases and the fuel consumption gradually decreases, the air supply fan 12 and the exhaust fan 20 of the paint booth 2 are activated to supply and exhaust the inside of the paint booth 2. And the injection nostle IIC of the air conditioner 11
A part of the heated air is supplied from the circulation duct 23 installed in the paint drying oven 4 through the supply duct 39, and the air introduced into the air conditioner 11 from the gear gallery 11a is heated. . Further, the air heated by the combustion burner IC is humidified by steam supplied from the steam supply device 41 to the steam injector lid through the supply pipe 40,
Conditioned air adjusted to a predetermined temperature and humidity is supplied into the painting booth 2.

In addition, in the setting room 3, an air supply fan 24 and an exhaust fan 26 are operated simultaneously with the operation of the painting booth 2, and clean outside air that has passed through the filter 23 is sent to the air supply duct 2.
2 and is supplied into the notating chamber 3 and discharged from the discharge duct 25.

When the inside of the painting booth 2 is maintained at a predetermined temperature and humidity and the inside of the paint drying oven 4 is maintained at a predetermined temperature, the automobile body W on the trolley 14 transported by the conveyor 13 is placed in the painting room 6. It is carried inside through the entrance. Then, when the automobile body W is transported near the automatic painting machines 17a and 17b arranged on both sides of the painting room 6, paint is sprayed by the spray guns 18a and 18b of the automatic painting machines 17a and 17b. A paint film is formed.

In this way, the car body W is conveyed by the conveyor 13 and is sprayed with paint to complete the painting process, and is then conveyed from the exit of the painting chamber 6 to the setting chamber 3 for the next process. In the setting chamber 3, the organic solvent contained in the paint film is appropriately evaporated. Thereafter, the automobile body W is transported to a paint drying oven 4, and the paint film is baked and hardened.

〔Effect of the invention〕

As explained above, in the painting equipment according to the present invention, a supply duct is arranged near the paint drying furnace, one end of which is connected to the circulation duct of the paint drying furnace, and the other end is connected to the paint booth. Since it is connected to the conditioned air supply source of the installed air supply duct, the heated air circulating in the circulation duct during steady operation of the paint drying oven can be used as a heat source for heating the conditioned air supplied to the paint booth. Since the heat source supplied to the air conditioner can be shared with the fuel supply source for drying paint, this has the effect of significantly improving the operating rate of the fuel supply source.

Furthermore, in the present invention, the heat source supplied to the air conditioner can be shared with the fuel supply source for paint drying, thereby eliminating the need for a heat source supply device for the air conditioner and reducing equipment costs. It has the effect of significantly reducing

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a coating equipment according to the present invention. FIG. 2 is an enlarged front view taken along line nn in FIG. 1. FIG. 3 is an enlarged front view taken along the line 11-1it in FIG. 1. FIG. 4 is a diagram showing the thermal energy consumption pattern of the painting booth. FIG. 5 is a diagram showing the thermal energy consumption pattern of the paint drying oven. i -1--Painting equipment 2-----1 Painting booth 3--Setting 4--1 Paint drying oven 10--Air duct 11-2-Air conditioner 9 - Exhaust duct 33 - - - Circulation duct 34 - Combustion burner 35 - Circulation fan 37 - Supply vibrator 39 - Supply duct No. Figure 1

Claims (1)

[Claims] A painting booth, a setting room, and a paint drying oven are arranged in series, an air supply duct and an exhaust duct connected to an air conditioned air supply source are connected to the paint booth, and a circulation duct is connected to the paint drying oven. A combustion burner and a circulation fan are installed in the middle of the circulation duct, and a supply pipe communicating with a fuel supply source is connected to the combustion burner. A supply duct is provided nearby, one end of which is connected to the circulation duct of the paint drying oven, and the other end is connected to the air conditioning air supply source of the air supply duct, so that the air is circulated during regular operation of the paint drying oven. Painting equipment characterized by using heated air as a heat source for the conditioned air supplied to the painting booth.